Leandre is the son of Pierre Tessier and Catherine Carrier. They had several children, including your Leandre and my wife's-gr-gr grandfather, Theophile, born 1838.
I have done the same trace back to Urbain. I am interested in sharing information with you about Pierre and Catherine's family group as my information remains incomplete. I understand that Pierre had about 13 children, but I only have info on about 5.